Eric Schmidt has done a talk at Dive Into Mobile today, and knowing Schmidt, we're in for quotable stuff. First, Android activations are up to 1.5 million per day now - which is insane. That's one The Netherlands every eleven days. Or, what takes Windows Phone a holiday quarter, Android does in four days. Schmidt also touched upon Facebook Home; a journalist asked him a question about it, referencing a Microsoft statement about Google most likely wanting to block Home, and in reply, Schmidt called Home a "tremendous endorsement" of Android's Play Store strategy.

*Even* if they don't use any type of hardware ID (IMEI, MAC, etc), people such as yourself count for 0.0000.....000% of the total activation.

Case of point, both me and a fairly large number of Android users around replace ROMs on a regular basis. This is the first time I heard about someone that also replaces the registration gmail address with each ROM.

Futhermore, given the fact that play/gmail combination helps you re-install your previous applications automatically (leaving you only the fairly small task of restoring "data" for a small number of applications), I can't really see the a wide use-case for using a different gmail address for each ROM...